Search Results
Results 351 - 400 of 559
< 3 4 5 6 7 8 9 10 11 12 >
Kau N - - 1995
The alternative use of flame photometry and ion selective electrodes for electrolyte determinations in neonatology led to the question how the two methods agree. 104 routine blood samples were taken as matched pairs for a comparison of sodium and potassium determinations. Pre-analytical error was avoided by the mode of blood ...
Guinard J - - 1994
The experiment examined patterns of mammary uptake of individual AA when graded amounts of calcium caseinate (0, 177, 362, and 762 g/d) were infused duodenally into four lactating cows. Six blood samples were collected over 12 h from the subcutaneous abdominal vein and the carotid. Mammary blood flow was measured ...
Ozkan H - - 1994
The differences between breast milk and infant formulas have been a popular subject of many recent studies. Most concern the chemical and biological characteristics of breast milk and infant formulas, but little work has been done about hemodynamic changes in the splanchnic circulation. In term neonates (n = 22) we ...
Päpke O - - 1994
70 blood samples--collected in 1993 in Germany--have been analysed for PCDD/PCDF. For all persons involved, no certain expose, except for food consumption, has been reported. The levels measured show a decrease of PCDD/PCDF compared to previous data on blood collected mainly in 1989 and in 1992. This trend for the ...
Bruckmaier R M - - 1994
Forty-four goats were milked and milk flow recorded without or with 1 min manual prestimulation in early, mid and late lactation. Ultrasound measurements of cross sections of the whole mammary gland were performed in a water bath. In additional experiments with 15 goats, milk flow was recorded and frequent blood ...
Bequette B J - - 1994
The kinetics of blood free amino acids (AA) transfer into milk casein were compared in goats (n 4) at 61 (SE 5) d (Expt 1; post-peak, 4.51 (SE 0.26) kg milk/d) and at 180 (SE 6) d (Expt 2; late, 2.36 (SE 0.16) kg milk/d) of lactation during non-primed, continuous ...
Picardo M - - 1994
We have previously reported that patients with active vitiligo (AVP) have elevated urinary levels of catecholamine metabolites, such as homovanillic and vanilmandelic acids, irrespective of the form of the disease (acrofacial, segmental, generalized). We have suggested that abnormal release of catecholamines from autonomic nerve endings might play an etiological role ...
Schlesser J E - - 1994
A flow calibration tube system was assembled to determine the volumetric flow rates for water and various dairy products through a holding tube, using three different flow promotion methods. With the homogenizer, the volumetric flow rates of water and reconstituted skim milk were within 1.5% of each other. With the ...
Stelwagen K - - 1994
The timing and relation of changes in mammary epithelial cell tight junction integrity and mammary blood flow during a 36-h milking interval were studied in six lactating Saanen goats. An increase in lactose concentration in plasma, a decrease in transepithelial potential difference, and changes in ionic milk composition were used ...
Laurman W - - 1994
A fatty streak, the earliest atherosclerotic lesion consists mostly of lipid-laden macrophages. The mechanism leading to accumulation of cholestrol ester in macrophages in vivo is unknown, but it may result from the uptake of modified low density lipoproteins that enter from blood or are modified within the arterial wall. In ...
Putyatina T K - - 1994
In order to examine the elimination rate of Perfluorodecalin (FDC) emulsions stabilized with different emulsifiers--yolk phospholipid (EYP) and procsanol P-268 (analog of Pluronic F-68)--we performed controlled trials on excretion of FDC in exhaled air, elimination from blood and accumulation in the liver. Adult Wistar rats were injected intravenously with FDC ...
Schulz P - - 1994
The patterns of biochemical and physiological variables values are subject-specific and quite stable over time. Thus, within the limits imposed by physiological requirements, the composition of the 'milieu intérieur' varies between individuals. It follows that having all values of blood constituents within the norm (defined statistically from populations of healthy ...
Walsh S W - - 1993
OBJECTIVE: We attempted to determine whether the human placenta secretes lipid peroxides. If it does, then it could be a source of lipid peroxides in maternal blood. STUDY DESIGN: In study 1 isolated human placental cotyledons (n = 7) were perfused serially for 20-minute intervals with control Krebs-Ringer-bicarbonate buffer gassed ...
Bruckmaier R M - - 1993
Eight cows were machine milked either in an operating theatre or in their familiar barn. During the experiments, milk flow curves were recorded and blood samples were taken for determination of concentrations of oxytocin, prolactin, cortisol and beta-endorphin. The milking cluster was attached without udder preparation. After cessation of milk ...
Suzuki N - - 1993
An improved flow injection analysis (FIA) method has been developed for the determination of trace selenium in biological samples, and this method has been applied to investigate the effect of captopril, an antihypertensive drug having a thiol group, on selenium concentrations in the rat blood, liver and urine. After oral ...
Winterbach H E - - 1993
Milk samples were taken daily or twice weekly, and blood samples twice weekly, from six clinically healthy dairy cows. Acetone concentration was determined by a new headspace gas-chromatographic method that proved to be suitable in terms of practically, sensitivity and precision. The concentration of acetone in milk was closely correlated ...
Sultan S M - - 1993
A flow injection titrimetric method for the assay of vitamin C using cerium(IV) was developed. A 157 mul vitamin C solution was injected into a carrier stream of 7.48 x 10(-3)M cerium(IV) prepared in 0.10M sulfuric acid flowing at a rate of 5.0 ml/min. A 1.3 ml mixing chamber was ...
Ryan J J - - 1993
The pharmacokinetics of polychlorinated dibenzofurans (PCDFs) and polychlorinated biphenyls (PCBs) in humans was studied by monitoring the blood concentrations of individuals who ingested a contaminated rice oil in Japan (yusho) in 1968 and in Taiwan (yu-cheng) in 1979. Sixteen yusho patients were followed from 1982 to 1990 and three yu-cheng ...
Dutta H - - 1993
Considering the high lipophilicity of propranolol (log P = 3.56), its interactions with the cell membrane lipids of goat blood have been investigated. It is observed that lipid loss after incubation of blood cells with propranolol hydrochloride in salt glucose medium for varying periods of time was accompanied with significant ...
Coe P H - - 1993
A field trial was conducted to measure differences in performance between selenium-supplemented and nonsupplemented heifers on a 1,200-cow California dairy. One hundred seventeen 19- to 27-month-old Holstein heifers were randomly assigned to treatment (n = 59) and control (n = 58) groups. A federally approved, commercially available, sustained-release intraruminal selenium ...
Mason R P - - 1993
Double quantum selective coherence transfer proton NMR spectroscopy has been used to observe glutathione in whole blood. The efficient water suppression of this technique avoids the need to resuspend the cells in D2O, hence avoiding equilibrium and kinetic isotope effects. Using this method we estimate the concentration of glutathione in ...
Vandeputte-Van Messom G - - 1993
In the present study newly calved cows were tentatively classified as moderate and severe responders to experimentally induced Escherichia coli mastitis based upon the reactive oxygen species (ROS)-generating capacity of their blood neutrophils before infection. The groups differed in blood and milk composition prior to infection. This initial classification was ...
Walawski K - - 1993
A herd of cows of the same age, kept in a stable system under controlled environmental conditions, was used to estimate the repeatability of diagnostic blood and milk indices in several stages of the I, II and III lactation. Attention was paid to genetic and non-genetic sources of phenotypic variation. ...
Prosser C G - - 1992
The milk yield and mammary blood flow responses to close-arterial, intra-mammary infusion of IGF-I were investigated in five Saanen goats milked frequently or normally the day before. Animals were infused for 6 h with recombinant human IGF-I (1.3 nmol/min) and milked hourly following i.v. injection of oxytocin beginning 2 h ...
Singh S S - - 1992
In dairy cattle, histopathology of the outer hind claws with overgrown sole revealed arteriosclerosis of blood vessels at the ulcer site in the sole. The laminae did not show any hyperplasia of the epidermis and thrombi were not seen in the blood vessels. Partial or complete disappearance of onychogenic substance ...
Girard C L - - 1992
Four calves were equipped with an electromagnetic flow probe inside the transverse duodenum and with electrodes at intervals of 2 cm on either side of the probe. Amounts of 0.5, 2.0, 3.5, and 5.0 kg of whole milk were given according to a latin square design. Recordings of digesta flow ...
Tsuchida E - - 1992
Lipophilic heme (1-laurylimidazole-ligated 5,10,15,20-tetrakis(alpha, alpha, alpha, alpha-o- pivalamidophenyl)porphinatoiron(II) complex) is solubilized in lipid (triglyceride) at high concentrations and emulsified with a phospholipid in physiological salt solution, giving a deeply red-colored suspension of lipid microspheres (approx. 250 nm in diameter). The heme forms an oxygen adduct in a similar manner as ...
Cooney S J - - 1992
A recently developed radioimmunoassay for PAF was applied to blood extracts with the aims of defining and overcoming problems that lead to erroneous results and establishing optimum conditions for the accurate determination of PAF levels. The high lipid content of blood was found to interfere with the assay, and it ...
Ahsan O - - 1992
In order to judge the therapeutic efficacy of thiamine (vitamin B(1)) in B-complex preparations, three commercial syrup preparations were analysed for thiamine content and their blood absorption in rabbits was compared with that of thiamine as a single entity. A separate experiment was performed to find the effect of sugar ...
Metcalf J A - - 1992
Blood flow across the lactating bovine mammary gland was measured by two techniques. The use of transit time flow probes appeared to give flows which correlated well with dye dilution in only one of five cows, although the relative changes in flow were similar between the techniques in four of ...
Noguchi K - - 1992
A HPLC method is developed for the determination of glutathione isopropyl ester, a drug for the treatment of cerebral vascular disease, in rat, dog and human blood. The blood is deproteinized with sulphosalicylic acid and the clear supernatant treated with a thiol-specific fluorogenic reagent, ammonium 7-fluorobenzo-2-oxa-1,3-diazole-4-sulphonate (SBD-F) in borate buffer ...
Telford R D - - 1992
Blood indicators of eight vitamins (B1, B2, B6, C, E, A, B12, folate) and six minerals (Cu, Mg, Zn, Ca, P, Al) were measured in 86 athletes before and after a 7- to 8-month period of training. During this period half consumed a multivitamin/mineral supplement and a matched group took ...
Iioka H - - 1992
The present study was primarily concerned with in vitro investigation of vitamin K2 (MK-4) transport using human placental villous tissues, with the objective of elucidating the placental transport mechanism of vitamin K2. 1. When vitamin K2 (MK-4) was not administered to gravidae, the observed concentrations of vitamin K2 were 0.32 ...
Bell F P - - 1992
Circulating blood monocytes were isolated from normal and hypercholesterolemic swine, and the monocyte lipid compositions and lipid biosynthesis profiles were assessed. The data indicate that monocytes freshly isolated from hyperlipemic swine have increased phospholipid and cholesterol contents and have increased biosynthetic capability for synthesizing phospholipids, triglycerides, and cholesteryl esters, but ...
Hall E D - - 1992
A considerable body of information supports the occurrence and pathophysiological importance of oxygen radical-mediated lipid peroxidation in acute cerebral damage secondary to traumatic or ischemic injury. Moreover, peroxidative mechanisms have been implicated in chronic neurodegenerative (e.g., Alzheimer's and Parkinson's diseases) and demyelinating (e.g., multiple sclerosis) disorders. Consequently, there has been ...
Thordstein M - - 1992
To detect a possible relationship between the increased vulnerability of the brain of the growth retarded fetus and lipid peroxidation, the activity of the latter was investigated in the forebrain of rat fetuses on day 22 of gestation (term = 23). Growth retardation was induced by uterine artery ligation on ...
Mathew O P - - 1991
Milk flow achieved during feeding may contribute to the ventilatory depression observed during nipple feeding. One of the important determinants of milk flow is the size of the feeding hole. In the first phase of the study, investigators compared the breathing patterns of 10 preterm infants during bottle feeding with ...
Bruckmaier R - - 1991
alpha-Adrenergic mimetics inhibit milk removal whereas beta-adrenergic mimetics have a favourable effect upon milk removal in dairy cows. This work aimed to relate these effects to the milk ejection reflex mechanism and/or milk flow from the cisternal cavities only. The alpha-adrenergic agonist phenylephrine and the beta-adrenergic agonist isoproterenol were injected ...
Tang C C - - 1991
Supplementation of mice from 22 d old with the K-Selenocarrageenan (0.25 ppm Se) in drinking water reduced gestation period by 3.2 d. Selenium supplementation increased litter size by 53.8% and average litter weight by 5%. Continuous supplementation with selenium (0.25 ppm) of mice until the age of 50-56 d significantly ...
Shaheen A A - - 1991
Radioprotective effect of cysteine, vitamin E and their combination on gamma-irradiation-induced alteration in some haematological parameters in male rats has been studied 24 and 48 hrs after whole-body gamma-irradiation at a dose level of 7.5 Gy. The results of this study reveal that gamma-irradiation caused a significant decrease in red ...
Grindal R J - - 1991
In a series of short-term experiments cows were subjected to exaggerated bacterial challenge and accentuated milking machine conditions known to predispose to new mammary infection. The incidence of new intramammary infection was significantly greater in quarters with peak flow rates greater than 1.6 kg/min whether they were exposed to impacts ...
Okine E K - - 1991
Four nonlactating Holstein dairy cows (BW = 692 +/- 49 kg) were used in a 4 x 4 Latin square design experiment to determine how changes in attributes of reticular contractions were related to changes in passage of digesta from the ruminoreticulum in cattle fed a forage-based diet. Frequencies of ...
Iioka H - - 1991
In order to examine the pharmacokinetics of vitamin K2, vitamin K2 (MK-4) was intravenously injected into mothers, and its transfer to placental tissue and the fetuses was examined. While incorporation of vitamin K2 into placental tissue was relatively active, transfer of vitamin K2 to fetal blood (cord blood) was small. ...
West J W - - 1991
Thirty-one lactating Holstein and Jersey cows were used to determine the effects of daily injections of 0 or 20 mg of recombinant bST on physiologic responses during hot, humid weather. Body temperature was determined by measuring milk temperature at each milking. Jugular blood was sampled for serum analysis of selected ...
Löwik M R - - 1991
The losses and redistribution of vitamin C in blood fractions (stabilized with reduced glutathione) during 4 hours of storage at room temperature in the dark was studied among 27 elderly women. Storage did not have a statistically significant (p greater than 0.05) effect on the mean vitamin C levels in ...
Saralakumari D - - 1991
Chronic exposure of humans to toxic levels of fluoride in drinking water resulted in significant increase in blood GSH content with significant increase in the activities of erythrocyte glutathione metabolising enzymes viz., gamma-glutamylcysteine synthetase (E.C. 6.3.2.2), gamma-glutamyltranspeptidase (E.C. 2.3.2.2), GST (E.C. 2.5.1.18), GSH-Px (E.C. 1.11.1.9) and GR (E.C. 1.6.4.2). The ...
Godfrey R W - - 1991
Brahman (n = 9) and 1/2 Simmental x 1/4 Brahman x 1/4 Hereford (n = 11) calves were utilized to determine the influence of exposure to cold on the physiology of the neonate. All calves were removed from their dams within 20 min of birth and prior to suckling. Calves ...
Quigley J D JD - - 1991
Effects of weaning age on plasma VFA were examined using 16 Holstein heifer calves. Animals entered the study at 6 +/- 3.5 d of age and were fed 1.8 kg milk twice daily to 28 (early weaning) or 56 d (late weaning) and a commercial pelleted calf starter from 0 ...
Lodman D W - - 1990
A winter grazing study was conducted to determine whether DL-methionine could replace soybean meal as a N supplement for gestating beef cows. During two winters (Trial 1, n = 51; Trial 2, n = 60), crossbred beef cows grazed native foothill range. Three treatment groups were supplemented with either none ...
Beers K - - 1990
The effect of glutathione (GSH) depletion on mean celiac blood flow (MCBF) was determined in domestic fowl. Diethyl maleate (DEM, 1 mL/kg body wt) decreased hepatic and duodenal GSH to approximately 15% of control. This GSH depletion was associated with an increase in MCBF and decreases in mean arterial blood ...
< 3 4 5 6 7 8 9 10 11 12 >